[Haskell-cafe] hflags

[Maurizio Vitale]

That was it, thanks.
I would have never figured it out on my own.

I've reported this issue in the hflags bugtracker (to get the workaround in
the docs). Hope it will be propagated to ghc if it is not already known.


On Fri, Feb 6, 2015 at 4:28 AM, Claude Heiland-Allen <claude at mathr.co.uk>
wrote:

> On 06/02/15 06:26, Maurizio Vitale wrote:
>
>> with ghc 7.8.4 and hflags 0.4 the following program:
>>
>> {-# LANGUAGE TemplateHaskell #-}
>>
>> module Main where
>>
>> import HFlags
>>
>> defineFlag "f" True "A flag."
>> --defineFlag "g" True "Another  flag."
>>
>
> return []
>
> -- see http://hackage.haskell.org/package/QuickCheck-2.7.6/docs/
> Test-QuickCheck-All.html#v:quickCheckAll - I haven't tested with hflags
> but it looks like the same issue from first glance
>
>
>
>> main = do
>>    _ <- $initHFlags "flags demo"
>>    print Main.flags_f
>>
>> gives me a runtime error about the flag f not being found, unless I add
>> the
>> declaration of a second flag. It seems like the last flag definition is
>> not
>> seen.
>>
>> Any idea/suggestion?
>>
>> Thanks,
>>
>>    Maurizio
>>
>
>
> Claude
> --
> http://mathr.co.uk
>
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